Amico Nema 4 Master Alarm - Manual (Page 50)

50 Amico Pipeline
Appendix M
Wiring Diagram Pressure Switch Connection to a Master Alarm
Red
Green
(for Ground)
Master
Module
Blue
e l
p r
u
P
NO C
l a
n
g i
S
m r
a l
A
w
o L
Source
Equipment
C NO NC C NO NC
e
g
n a
r
O
n
w
o r
B
NC C
d e
R
e l
p r
u
P
NO C
l a
n
g i
S
m r
a l
A
w
o L
l a
n
g i
S
m r
a l
A
h
g i
H
C
Switch for
High Alarm Switch for
Low Alarm
Note: There are 2 NIT switches, one for high alarm and one for low alarm.
NO
w
o l l
e Y
e
u l
B
Green
(for Ground)
not required
2 - 1/2”
3 - 1/2”
3/4” NPT Conduit
Connection
Circuit No. 1
Calibrated Dia l
1/4” NPT
Gas Service
Connection
wiring code
Ground - Green
Common - Purple
Normally Closed -Red
Normally Open -Blue
Circuit #1 for Low Circuit #2 for High
Common - Purple Common - Brown
Normally Closed - Blue Normally Closed - Orange
Normally Open - Red Normally Open - Yellow
Circuit No. 1 Circuit No. 2
Re
d
Blu
e
Pu
rp
le
Bro
w n
O
ra
ng
e
Ye
llo
w
NO C C NC
Vacuum
Gas
(OXY, AIR, N 2 O, CO 2 )
Nitrogen
wiring code
Six Leads
18” Long (Approx.)
9/32” x 5/8”
Mounting
Hole (Typ.)
Circuit No. 2
Calibrated Dial
NOTE: There are 2 NIT switches, one for high alarm and one for low alarm.